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<<< An Explanation of Kakioka One Second Resolution Geomagnetic Data on the CD-ROM >>>
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   The one-second resolution geomagnetic field data are useful in various research
fields such as geomagnetic pulsation, crustal resistivity, etc..  However, it is still
not so convenient to use such high-time resolution data on-line because of the
limitation in network transfer speed.
  
   This CD-ROM contains the one second resolution geomagnetic field data observed at 
Kakioka Magnetic Observatory located at (Geographic Latitude, Geographic Longitude) = 
(36.23, 140.19). The data have been supplied to the World Data Center C2 for Geomagnetism, 
Kyoto for public use. The latest data are available from the data center through WWW
on-line service (http://swdcdb.kugi.kyoto-u.ac.jp). 

   Three magnetic components (H, Z and D) are measured by the fluxgate magnetometer 
every second with 0.01nT resolution. The values are derived using provisional base line 
values. For more information, please refer "Report of the Kakioka Magnetic Observatory".

   The data on this CD-ROM are written with 2-byte binary integer usually used in the 
UNIX system on most work stations.  We need to exchange the order of the two (i.e.,   
upper and lower) bytes when we use the data with PCs (i.e., DOS, LINUX, WINDOWS etc.). 
The sample program on this CD-ROM written in C and FORTRAN language can be used 
in most systems. A plot program (plot.exe) on PC which create a Post Script 
file is also included on this CD-ROM.

   The directory and file structure in this CD-ROM is as follow:

              readme.txt
              format.txt
              sample.c
              sample.f
              plot.exe
              1990 --------- kak9001.sec
                             kak9002.sec
                             ...........
                             ...........
                             kak9012.sec

              1991 --------- kak9101.sec
                             kak9102.sec
                             ...........
                             ...........
                             kak9112.sec
 
      

   When you publish the results by using the data on this CD-ROM, please acknowledge
to the Kakioka Magnetic Observatory.


                                    November 27, 1998
                                               
                                         S-RAMP Database Commitee, Japan:
                                         Kakioka Magnetic Observatory:        
                                         World Data Center C2 for Geomagnetism, Kyoto:


** Note **
   When you publish any results using the data, please send a reprint or a copy
 of the article to the following address:
       Kakioka Magnetic Observatory
       Kakioka 595
       Niihari-gun, Yasato-machi
       Ibaraki 315-0116
       Japan

 and also to:
       World Data Center C2 for Geomagnetism, Kyoto
       Graduate School of Science
       Kyoto University
       Kyoto 606-8502
       Japan